// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/trace_event/memory_allocator_dump_guid.h"

#include "base/format_macros.h"
#include "base/sha1.h"
#include "base/strings/stringprintf.h"

namespace base {
namespace trace_event {

    namespace {
        uint64_t HashString(const std::string& str)
        {
            uint64_t hash[(kSHA1Length + sizeof(uint64_t) - 1) / sizeof(uint64_t)] = { 0 };
            SHA1HashBytes(reinterpret_cast<const unsigned char*>(str.data()), str.size(),
                reinterpret_cast<unsigned char*>(hash));
            return hash[0];
        }
    } // namespace

    MemoryAllocatorDumpGuid::MemoryAllocatorDumpGuid(uint64_t guid)
        : guid_(guid)
    {
    }

    MemoryAllocatorDumpGuid::MemoryAllocatorDumpGuid()
        : MemoryAllocatorDumpGuid(0u)
    {
    }

    MemoryAllocatorDumpGuid::MemoryAllocatorDumpGuid(const std::string& guid_str)
        : MemoryAllocatorDumpGuid(HashString(guid_str))
    {
    }

    std::string MemoryAllocatorDumpGuid::ToString() const
    {
        return StringPrintf("%" PRIx64, guid_);
    }

} // namespace trace_event
} // namespace base
